Originally Posted by
richardfp4
I have a machine with 2 Okuma VAC2 11 kw spindle drives 1993 Okuma LT15.
One of them gets a power loss red led while the green power led is on.
Only the red and the green led is on while all other leds are off and there is
no alarm nummer shown. The led display is also off.
I seems to be the 5 volt that is 1 volt.
It is temperature dependent. If I start the machine on in the morning it
gets this erros after 5 minutes.
But when I restart the machine the same error repeats in 1 minut.
If I let it cool down it takes 5 minutes again before the error pops up again.
The error we get on the display is
78 error P VAC start spindle 2 1001FFFF
We could exchange some components on the print but I don't
know where to start and wonder if this is a known issue with
these old drives.
Does anybody know which components could be suspected?
I could post a picture of the print.
Thanks